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dc.contributor.authorSteele, John H.  Concept link
dc.contributor.authorGifford, Dian J.  Concept link
dc.contributor.authorCollie, Jeremy S.  Concept link
dc.date.accessioned2011-11-29T19:33:57Z
dc.date.available2011-11-29T19:33:57Z
dc.date.issued2011-06
dc.identifier.urihttps://hdl.handle.net/1912/4902
dc.descriptionAuthor Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Fisheries Research 111 (2011): 139-144, doi:10.1016/j.fishres.2011.07.009.en_US
dc.description.abstractThree methods are described to estimate potential yields of commercial fish species: (i) single-species calculation of maximum sustainable yields, and two ecosystem-based methods derived from published results for (ii) energy flow and for (iii) community structure. The requirements imposed by food-web fluxes, and by patterns of relative abundance, provide constraints on individual species. These constraints are used to set limits to ecosystem-based yields (EBY); these limits, in turn, provide a comparison with the usual estimates of maximum sustainable yields (MSY). We use data on cod and haddock production from Georges Bank for the decade 1993-2002 to demonstrate these methods. We show that comparisons among the three approaches can be used to demonstrate that ecosystem based estimates of yields complement, rather than supersede, the single-species estimates. The former specify the significant changes required in the rest of the ecosystem to achieve a return to maximum sustainable levels for severely depleted commercial fish stocks. The overall conclusion is that MSY defines changes required in particular stocks, whereas EBY determines the changes required in the rest of the ecosystem to realize these yields. Species specific MSY only has meaning in the context of the prey, predators and competitors that surround it.en_US
dc.description.sponsorshipWe acknowledge NSF awards OCE081459 (to DJG) and OCE0814474 (to JHS).en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.fishres.2011.07.009
dc.subjectEcosystem-baseden_US
dc.subjectSustainableen_US
dc.subjectCoden_US
dc.subjectHaddocken_US
dc.subjectGeorges Banken_US
dc.titleComparing species and ecosystem-based estimates of fisheries yieldsen_US
dc.typePreprinten_US


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